That's an opinion. My contrasting opinion is that not only does 4E fall within the D&D genre, it added some thing to D&D which I'm not willing to accept D&D without in the future.
To me, 4e is not Dungeons and Dragons, althrough I took several elements from it for my house rules. Even the 4e players in my groups refer to it as Dwarfs and Dungeons

they play it because they like the system not because it has a standard D&D feel. Of course if someone started with 4e it would be different. Then again, I am not really insisting on a totally "standard" D&D feel, new things can be fun.
1. Real balance, between classes and balance against encounters. Being balanced over an adventuring day of X rounds of combat is NOT balance.
4. Continuing 4E's focus on D&D as a strong, class based system as opposed to being undermined by 3E multiclassing or classes being merely packages of abilities from a menu.
And we could discuss ad infinitum about what exactly balance means to who but there already is a thread for that

I'm not for balance being enforced by the system, to me it is for the group to find their own balance. Balanced PCs are, too me, bordering on boring.
I'm also not for class based, actually, I'd rather have the option to abandon classes as such and create PCs via backgrounds and other toolkits. As mentioned above.

So packages of abilities "from a menu" would work very well for me. Actually, enforcing a strong class based system would probably turn me away.
I could see both options in the game though.